| 摘要 |
PROBLEM TO BE SOLVED: To reduce a wasteful load of an air conditioner in an interior space in which cooling is performed, and an air conditioner in a perimeter space in which heating is performed.SOLUTION: This ventilation device has passage switching mechanisms 19, 22, 23 for switching a ventilation operation for supplying the outdoor air OA taken from an outside air suction opening 12 to the perimeter space from an air supply opening 18 and discharging the indoor air RA in the interior space taken from an inside air suction opening 16 from an exhaust opening 14, and a circulating operation for supplying the indoor air RA in the interior space taken from the inside air suction opening 16 from the air supply opening 18. |
